return null;
        }
        if (permission.startsWith(fessConfig.getRoleSearchUserPrefix())
                && permission.length() > fessConfig.getRoleSearchUserPrefix().length()) {
            return aclPrefix + userPrefix + permission.substring(fessConfig.getRoleSearchUserPrefix().length());
        }
        if (permission.startsWith(fessConfig.getRoleSearchGroupPrefix())

        ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {
            private static final long serialVersionUID = 1L;

            @Override
            public String getRoleSearchUserPrefix() {
                return fessConfig.getRoleSearchUserPrefix();
            }

            @Override
            public String getRoleSearchGroupPrefix() {
                return fessConfig.getRoleSearchGroupPrefix();
            }

            }

            @Override
            public String getLdapGroupFilter() {
                return "(memberOf=%s)";
            }

            @Override
            public String getRoleSearchUserPrefix() {
                return "U";
            }
        });

        ComponentUtil.register(new LdapManager() {
            @Override

                    permissions = distinct(roles);
                    ComponentUtil.getActivityHelper().permissionChanged(OptionalThing.of(new FessUserBean(this)));
                }), fessConfig.getRoleSearchUserPrefix() + ldapManager.normalizePermissionName(getName())));
            } else {
                permissions = StringUtil.EMPTY_STRINGS;
            }
        }
        return permissions;
    }

    @Override

     */
    public boolean isUserPermission(final String permission) {
        if (StringUtil.isNotBlank(permission)) {
            return permission.startsWith(ComponentUtil.getFessConfig().getRoleSearchUserPrefix());
        }
        return false;
    }

    /**
     * Gets the search role for a given user.
     *
     * @param name The username.
     * @return The search role.
     */

        }
        final List<String> list = validPermissionList;
        return stream(permissions).get(stream -> stream.allMatch(v -> list.contains(v)));
    }

    String getRoleSearchUserPrefix();

    String getRoleSearchGuestPermissions();

    default List<String> getSearchGuestRoleList() {
        @SuppressWarnings("unchecked")

     * The value is, e.g. 1 <br>
     * comment: Prefix for user roles in search.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getRoleSearchUserPrefix();

    /**
     * Get the value for the key 'role.search.user.prefix' as {@link Integer}. <br>
     * The value is, e.g. 1 <br>
     * comment: Prefix for user roles in search.